Add an official JS vscode launch config, since it's the only good editor for TS. This file has been requested of me multiple times, and I'm getting tired of sending it to everyone who wants to contribute

Author: trxcllnt

.gitignore

@@ -35,7 +35,7 @@ MANIFEST
 
 cpp/.idea/
 python/.eggs/
-.vscode
+.vscode/**
 .idea/
 .pytest_cache/
 pkgs

js/.gitignore

@@ -23,7 +23,8 @@ npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
 
-.vscode
+.vscode/**
+!.vscode/launch.json
 
 # Runtime data
 pids

js/.vscode/launch.json

@@ -0,0 +1,120 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug Gulp Build",
+            "program": "${workspaceFolder}/node_modules/gulp/bin/gulp.js",
+            "args": [
+                "build",
+                // Specify we want to debug the "src" target, which won't clean or build -- essentially a "dry-run" of the gulp build
+                "--target", "src"
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug Unit Tests",
+            "cwd": "${workspaceRoot}",
+            "program": "${workspaceFolder}/node_modules/.bin/jest",
+            "skipFiles": [
+                "<node_internals>/**/*.js",
+                "${workspaceFolder}/node_modules/**/*.js"
+            ],
+            "env": {
+                "NODE_NO_WARNINGS": "1",
+                "READABLE_STREAM": "disable",
+                "TEST_DOM_STREAMS": "true",
+                "TEST_NODE_STREAMS": "true",
+                "TEST_FILE_NAMES": "primitive-empty primitive simple datetime decimal dictionary nested struct_example",
+                // Modify these environment variables to run tests on a specific compilation target + module format combo
+                "TEST_TS_SOURCE": "true",
+                // "TEST_TS_SOURCE": "false",
+                // "TEST_TARGET": "es5",
+                // "TEST_MODULE": "cjs"
+            },
+            "args": [
+                // "-i",
+                "test/unit/ipc/",
+                "test/integration/*",
+
+                // Uncomment any of these to run individual test suites
+                // "test/unit/table-tests.ts",
+                // "test/unit/ipc/message-reader-tests.ts",
+                // "test/unit/ipc/record-batch-writer-tests.ts",
+                // "test/unit/ipc/record-batch-json-reader-tests.ts",
+                // "test/unit/ipc/record-batch-file-reader-tests.ts",
+                // "test/unit/ipc/record-batch-stream-reader-tests.ts",
+                // "test/unit/ipc/record-batch-reader-from-tests.ts",
+                // "test/unit/ipc/record-batch-reader-streams-dom-tests.ts",
+                // "test/unit/ipc/record-batch-writer-streams-dom-tests.ts",
+                // "test/unit/ipc/record-batch-reader-streams-node-tests.ts",
+                // "test/unit/ipc/record-batch-writer-streams-node-tests.ts",
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug Integration Tests",
+            "cwd": "${workspaceRoot}",
+            "program": "${workspaceFolder}/node_modules/.bin/jest",
+            "skipFiles": [
+                "<node_internals>/**/*.js",
+                "${workspaceFolder}/node_modules/**/*.js"
+            ],
+            "env": {
+                "TEST_TS_SOURCE": "true",
+                "NODE_NO_WARNINGS": "1",
+                "READABLE_STREAM": "disable",
+                "TEST_DOM_STREAMS": "true",
+                "TEST_NODE_STREAMS": "true",
+                "TEST_FILE_NAMES": "primitive-empty primitive simple datetime decimal dictionary nested struct_example"
+            },
+            "args": [
+                // "-i",
+                "test/integration/*"
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug bin/file-to-stream",
+            "env": { "ARROW_JS_DEBUG": "src" },
+            "runtimeArgs": ["-r", "ts-node/register"],
+            "args": [
+                "${workspaceFolder}/bin/file-to-stream.js",
+                "./test/data/cpp/file/struct_example.arrow",
+                "./struct_example-file-out.arrow",
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug bin/stream-to-file",
+            "env": { "ARROW_JS_DEBUG": "src" },
+            "runtimeArgs": ["-r", "ts-node/register"],
+            "args": [
+                "${workspaceFolder}/bin/stream-to-file.js",
+                "./test/data/cpp/stream/simple.arrow",
+                "./test/data/simple-file-out.arrow",
+            ]
+        },
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Debug bin/json-to-arrow",
+            "env": { "ARROW_JS_DEBUG": "src" },
+            "runtimeArgs": ["-r", "ts-node/register"],
+            "args": [
+                "${workspaceFolder}/bin/json-to-arrow.js",
+                "-j", "./test/data/json/union.json",
+                "-a", "./test/data/union-file.arrow",
+                "-f", "file"
+            ]
+        }
+    ]
+}